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摘要：
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钢套箱围堰是为解决水上承台和水上桥墩施工而设计的临时阻水结构,其作用是通过钢套箱围堰和封底混凝土阻水,为水上承台和水上桥墩的施工提供无水的干施工环境。结合洋安大桥工程的实例,重点介绍无底钢套箱的设计、制作、安装和封底混凝土的施工方法,其中钢套箱的分块制作,现场拼装,整体下放工艺因避免使用大型船机设备,大大节约工程成本取得较好的效果,可广泛应用。现场使用结果证明该钢套箱结构设计合理,安装方法得当,定位准确,施工简便可行,取得显著的效果。
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Steel jacket box cofferdam is a temporary retaining structure designed for bearing platform and bridge pier construction on water,the aim of this study is to provide a dry construction conditions for bearing platform and bridge pier construction on water by means of retaining water of steel jacket box cofferdam and sub-sealing concrete.The construction methods of design,prefabrication,erection and sub-sealing concrete of bottomless steel jacket box are mainly introduced on the basis of the case history of Yang'an Bridge.Because large ship and machinery equipments were not used in the construction of fabrication of steel jacket box in sections,assembly on site and integral lowering into position,the cost of the project reduced greatly.The practice on site has proved that the structural design of the steel jacket box is rational,installation method is suitable,position is precise and construction method is simple and practical.
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基金项目：
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作者简介：
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参考文献：
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[1]JT J041-2000,公路桥涵施工技术规范[S].
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